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Radioactive decay
________ is the process by which an unstable atomic nucleus loses energy by radiation.
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Beta decay
________ occurs when in a nucleus with too many protons or neutrons, one of the protons or neutrons gets transformed into the other.
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alpha particle
When a(n) ________ is emitted from a nucleus the nucleus loses two protons and two neutron.
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Becquerel
________- Unit of activity which is 1 decay per sec.
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Geiger Muller
The instrument used to detect the effects of radiation is called the ________ tube (can detect and measure radiation)
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Neutrons
________ have a charge of 0 and a mass of 1.
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Protons
________ have a charge of +1 and a mass of 1.
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Ionisation
________- Atoms that have become charged by their electrons being knocked of by radiation.
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Gamma radiation
________ is part of the EM spectrum; a wave with a very high frequency and a very short wavelength.
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Gamma rays
________ are used to sterilise syringes because ________ are penetrating but as well as this ________ kill viruses and bacteria.
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alpha source
It is more dangerous to eat food contaminated with a(n) ________ as it is more ionising.
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Geiger Muller Tube
Count rate is the number of decays actually recorded per second by detector (ex: ________)
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Peer review
________- data published and checked by other scientists.
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Beta radiation
________ is a fast moving high energy electron, and is called a beta particle.
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high speed
It is the nucleus of a helium particle and travels at a very ________.
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Half life
________- How long it takes for half the nuclei to decay.
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atom
A(n) ________ decays into a new atom by changing a neutron into a proton and an electron.
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atom
A(n) ________ decays into a new atom by and emits alpha particle.
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Half life
________- the time it takes for half the nuclei to decay.
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Gamma radiation
________ is a high energy electromagnetic radiation with an electric charge of 0 and a relative atomic mass of 0.
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There are three main types of radiation
Gamma, Beta and Alpha
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Radioactive decay
becoming stable
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Count rate is the number of decays actually recorded per second by detector (ex
Geiger-Muller Tube)
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Half-life
the time it takes for half the nuclei to decay
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Irradiated
when an object has been exposed to ionising radiation
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Ionisation
Atoms that have become charged by their electrons being knocked of by radiation
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Peer review
data published and checked by other scientists
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Count rate
the number of counts per second on a geiger counter
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Half-life
How long it takes for half the nuclei to decay
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Becquerel
Unit of activity which is 1 decay per sec
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